Description from Flora of China
Marsdenia urceolata Decaisne in A. de Candolle, Prodr. 8: 617. 1844.
Stems slender, to 3 m, grayish, pubescent along 2 lines. Petiole 4-15 mm; leaf blade ovate or ovate-lanceolate, 1.5-5 × 0.6-4 cm, thin leathery, glabrous, base rounded, rarely subcordate, apex mucronate; lateral veins 4 or 5 pairs, flat adaxially, slightly elevated abaxially. Cymes much shorter than leaves, 8-10-flowered; peduncle 2-5(-17) mm, puberulent. Sepals ovate, unequal, ± scarious, up to 0.8 mm, ciliate, apex rounded. Corolla green to yellow, 3-4 mm; lobes erect, ovate-oblong, ca. 1.5 × 1 mm. Corona lobes falcate. Anther appendages acute, inflexed. Ovaries glabrous. Follicles linear-lanceolate, ca. 8 cm × 5 mm, glabrous. Seeds ovate-oblong, ca. 6 × 2 mm, marginate; coma ca. 3.5 cm. Fl. Mar-Sep, fr. May-Dec.
The whole plant is used for the treatment of pain caused by rheumatism.
Mixed woods, thickets; 300-800 m. Guangdong, Guangxi, Hainan, Hunan, Sichuan [Vietnam]